--- On Tue, 10/14/08, shradha mukherjee <[EMAIL PROTECTED]> wrote:
> From: shradha mukherjee <[EMAIL PROTECTED]>
> Subject: [R] problem using R
> To: r-help@r-project.org
> Received: Tuesday, October 14, 2008, 4:37 AM
> Hi ,
> I am having serious trouble doing this homework. I am using
> R for doing the homework. I am having the following specific
> problem:
> a) when I input the data using the command > Wbdc
> <-read.table("wdbc.txt") I do not see the
> data.
Your attachment did not reach me. However :
Type wdbc
If you have read in the data correctly you will see the data.frame
R does not automatically show things. You need to ask :)
> b) When I want to run histogram using command >
> hist(area) I get an error message,
> Error in hist(area) : object "area" not found.
R probably cannot find the variable "area". Assuming that area is a variable in
the dataframe wdbc you can try: hist(wdbc$area)
I'd suggest that you have a look at some of the basic tutorials or other papers
in the R collection. You need to get a better idea of how the basic components
of R work. Dr. Kim's tutorial at
http://www.math.ilstu.edu/dhkim/Rstuff/Rtutor.html may be helpful
Otherwise go to the R home page and click on Other in the left hand column and
then select contributed documenation. Kickstarting R is quite good and
Icebreaker R looks promising but I have only glanced at it.
There is also the Introduction to R but my personal opinion is that this is an
excellent document ONCE you have some idea of how R works. It is not really
good for a neofite trying to use R for the first time.
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